/*
 * Copyright 2019-2020 by Nedim Sabic Sabic
 * https://www.fibratus.io
 * All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package aggregator

import (
	"github.com/rabbitstack/fibratus/pkg/kevent"
	"github.com/rabbitstack/fibratus/pkg/outputs"
)

// queue defines the type alias for the batch worker queue
type queue chan *kevent.Batch

// submitter initializes a group of load balanced output producers.
type submitter struct {
	wq      queue
	workers []*worker
}

func newSubmitter(wq queue, outputConfig outputs.Config) (*submitter, error) {
	output, err := outputs.Load(outputConfig.Type, outputConfig)
	if err != nil {
		return nil, err
	}
	clients := output.Clients
	workers := make([]*worker, len(clients))

	for i, client := range clients {
		workers[i] = initWorker(wq, client)
	}

	return &submitter{wq: wq, workers: workers}, nil
}

func (s *submitter) shutdown() error {
	for _, w := range s.workers {
		if err := w.close(); err != nil {
			return err
		}
	}
	return nil
}
